Auguste Frederie Louis Viesse De Marmont, duke of Ragusa, a marshal of France, born in Cha-tillon-sur-Seine, July 20, 1774, died in Venice, Feb. 28, 1852. He was descended from an ancient family, and at 15 years of age entered a regiment of infantry as sub-lieutenant 'I hree years afterward he was transferred to the ar-tillerv; and having fallen under the notice of Bonaparte, he was in 1796 appointed his first aide-de-camp, in which capacity he Berved with distinction in the two Italian campaigns. He accompanied the expedition to Egypt, and for his good conduct at the investment of Malta was appointed a general of brigade. He returned with Bonaparte to France, and for his cooperation on the 18th Brumaire was appointed commander-in-chief of the artillery in the army of reserve. The successful transportation of the French artillery over the Great St Bernard in the spring of 1800 was in a great measure due to his exertions; and the skill with which he managed his batteries at Marengo procured him the rank of general of division. He participated with credit in the campaign of 1805 in Germany, and in 1806 was made commander-in-chief of the forces in Dal-matia, where he remained till 1809. For his successful defence of Ragusa against a greatly superior force of Russians and Montenegrins, Sept. 30, 1806, he subsequently received the title of duke of Ragusa. After the battle of Aspern and Essling (May 21, 22, 1809) he brought up his corps in good order to the assistance of the emperor, defeating on the way superior bodies of Austrians in several encounters; and for his conduct at the battle of Wagram and in the subsequent pursuit of the enemy, he was created a marshal of the empire.

In 1811 he was sent to relieve Massena in Portugal, and he ended a series of unfortunate movements by losing the battle of Salamanca, which ruined the French cause in the Peninsula. Having recovered from a severe wound received on this occasion, he joined the emperor in Germany in 1813, and fought at Liitzen, Bautzen, Dresden, and Leipsic, with a valor which in some degree retrieved his military reputation. In the campaign of 1814 he vigorously cooperated with Napoleon in the brilliant but useless series of battles by which the advance of the allies was sought to be staved, and on March 29 arrived with the rem-nant of his corps before Paris. At the battle of Paris fought on the succeeding day, he showed the utmost intrepidity and devotion to the imperial cause, and, with the few thousand men composing his own corps and that of Marshal Mortier, withstood formany hours the attacks of an army four times as numerous. An armistice was finally agreed upon, and late in the day Marmont, availing himself of a letter from Joseph Bonaparte, who had been appointed lieutenant general of the empire, authorizing him to enter into an arrangement with the allied sovereigns, agreed to evacuate the city.

On the 31st the allies entered Paris in triumph; and four days afterward Marmont influenced by a senatus consultum declaring Napoleon's forfeiture of the throne, and abolishing the right of succession of his family, gave in his adhesion to the provisional government which had been formed under the presidency of Talleyrand; stipulating, however, that the life and personal freedom of Napoleon should be secured, and that the French troops should be provided with secure quarters in Normandy. On April 5 his corps, numbering 12,000 men, accordingly entered within the allied hues and took the road to Normandy. The indignation of Napoleon at this proceeding was boundless, and, in an order issued from rontainebleau immediately after the news reached him, he expressly disavowed it, observing: The emperor cannot approve the condition on which the duke of Ragusa has taken this step; he cannot accept life and hberty at the mercy of a subject." Duringthe hundred days he expressly excepted him from the imperial act of amnesty, and subsequently at St. Helena, speaking of his defection, said.: "I was betrayed by Marmont, whom I might call my son, my offspring, my own work." He received numerous distinctions from the Bourbons after the first and second restorations, but about 1825 retired to his country seat, whence, in July, 1830, he was suddenly summoned to Paris to quell the revolt against Charles X. Failing in this, he was obliged to share the exile of the Bourbons; and so strong was the odium excited against him, that his name was struck from the list of the French army.

He never reentered France, but wandered over Europe, fixing his residence finally at Venice, where his latter years were passed. He published his travels in Hungary, southern Russia, Syria, Egypt, etc, and Esprit des institutions niilitaires, which Marshal Bugeaud wished to place in the hands of every officer in the service; and left an autobiography, published in Paris under the title of Memoir es du due de Raguse (9 vols., 1856).